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 Post subject: Re: SCM 440
PostPosted: Mon Dec 04, 2017 6:15 am 
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Joined: Tue May 30, 2017 8:21 pm
Posts: 10
Thanks Tuff XF

Prices are on the CHI web site mate, these ones have had some love

http://www.chiheads.com.au/shop/heads/k ... nder-head/

The pro series manifold is just over 1K Aussie $


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 Post subject: Re: SCM 440
PostPosted: Tue Dec 05, 2017 10:39 am 
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Posts: 177
Russxr67 Just wondering what your old heads were?350 cfm get you to 800 + hp


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 Post subject: Re: SCM 440
PostPosted: Tue Dec 05, 2017 6:35 pm 
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Posts: 200
Steve.k wrote:
Russxr67 Just wondering what your old heads were?350 cfm get you to 800 + hp


Hey Steve, the old combo made 763hp on pump gas not 800+.
After the engine was dismantled I flowed the heads and we came up with 376 CFM from a port that was 3.1 square inches .
The new heads we are using are the same cross section but we've increased the flow exponentially.
To target the 850 we're after we needed an upgraded port design and whilst the SCM head we used was great in the old combo we needed a port with a higher entry and a smaller chamber to get things moving. The SCM heads were 59cc and the C400's are a much shallower design.


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 Post subject: Re: SCM 440
PostPosted: Thu Jan 04, 2018 4:39 pm 
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Joined: Wed Oct 31, 2012 8:43 pm
Posts: 297
russxr67 wrote:
Steve.k wrote:
Russxr67 Just wondering what your old heads were?350 cfm get you to 800 + hp


Hey Steve, the old combo made 763hp on pump gas not 800+.
After the engine was dismantled I flowed the heads and we came up with 376 CFM from a port that was 3.1 square inches .
The new heads we are using are the same cross section but we've increased the flow exponentially.
To target the 850 we're after we needed an upgraded port design and whilst the SCM head we used was great in the old combo we needed a port with a higher entry and a smaller chamber to get things moving. The SCM heads were 59cc and the C400's are a much shallower design.



Russ, sounds like one bad Mo Fo, good to see real numbers and experience. How do the new Higgins heads compare, any info on them....DragBoss

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Tim/Izzy


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 Post subject: Re: SCM 440
PostPosted: Fri Jan 05, 2018 1:12 am 
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Joined: Fri Mar 01, 2013 9:58 pm
Posts: 200
DragBoss wrote:
russxr67 wrote:
Steve.k wrote:
Russxr67 Just wondering what your old heads were?350 cfm get you to 800 + hp


Hey Steve, the old combo made 763hp on pump gas not 800+.
After the engine was dismantled I flowed the heads and we came up with 376 CFM from a port that was 3.1 square inches .
The new heads we are using are the same cross section but we've increased the flow exponentially.
To target the 850 we're after we needed an upgraded port design and whilst the SCM head we used was great in the old combo we needed a port with a higher entry and a smaller chamber to get things moving. The SCM heads were 59cc and the C400's are a much shallower design.



Russ, sounds like one bad Mo Fo, good to see real numbers and experience. How do the new Higgins heads compare, any info on them....DragBoss


Hey Tim, haven't seen a set of them yet to be honest and info on them is thin .
SCM have a new race head under development as well .


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 Post subject: Re: SCM 440
PostPosted: Sat Jan 06, 2018 12:33 pm 
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Joined: Wed Oct 31, 2012 8:43 pm
Posts: 297
Yes, I would say that of all the top heads, doubt there is much difference, 15, maybe 20cfm? what do you think? Imagine those heads, and a TrackBoss Block, and air supremacy... Ck out that dyno vid I posted... more in it.

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 Post subject: Re: SCM 440
PostPosted: Sun Jan 07, 2018 5:03 pm 
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Posts: 200
Mate, there's plenty of new gear on the market and if you are the first to use it then you're a bit of a pioneer with that product.
You can sometimes have an engine that makes good dyno figures but doesn't get down the track like it should.


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 Post subject: Re: SCM 440
PostPosted: Sun Jan 07, 2018 7:36 pm 
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russxr67 wrote:
Mate, there's plenty of new gear on the market and if you are the first to use it then you're a bit of a pioneer with that product.
You can sometimes have an engine that makes good dyno figures but doesn't get down the track like it should.

I can dig what your saying, Once the TrackBoss is available, watch the power continue to climb for those building them. Well I have raced current 408 combo with 4150 carb with great success, cant wait to see how the air supremacy works, with the APD 1050, 3 months to go.TrackBoss CGI will be ready by then.

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 Post subject: Re: SCM 440
PostPosted: Thu Jun 21, 2018 3:19 am 
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Joined: Fri Mar 01, 2013 9:58 pm
Posts: 200
Image



Image

Short is complete.
Callies crank , Oliver's rods, custom CP slugs


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 Post subject: Re: SCM 440
PostPosted: Thu Jun 21, 2018 6:13 am 
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Joined: Mon Oct 29, 2012 9:05 am
Posts: 2417
Nice.

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